User's Manual Part 2
Host Computer Commands
RVP8 User’s Manual
May 2003
6–38
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| | | | | | | | | | | | | | | | |
| |NoI|Ena|El |BCD|Ld | | 1 0 0 0 1 | Command
|___________|___|___|___|___|___|___________|___________________|
NoI Ordinarily, the potentially lengthy sync wait loop is terminated if the user writes
additional words to the RVP8. Setting this bit prevents such interrupts. Beware
that the processor loop can not be broken in this case except by moving the anten-
na across a trigger angle, or cycling the RESET_ line.
Ena Enables antenna synchronization.
El Synchronization is based on TAG15–31 (Elevation) inputs, else TAG0–15 (Azi-
muth) is used.
BCD Specifies that TAG angle input is in the form of 4-digit Binary Coded Decimal;
otherwise, a 16-bit binary angle is assumed.
Ld Indicates that a new table size and array of values follow the command. If Ld = 0,
then LSYNC is a one-word command only.
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| | | | | | | | | | | | | | | | |
| Number of Trigger Angles that Follow (3 – 1024) | Input 1
|_______________________________________________________________|
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| | | | | | | | | | | | | | | | |
| (Ignored) | Input 2
|_______________________________________________________________|
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| | | | | | | | | | | | | | | | |
| First Trigger Angle (16-Bit Binary Angle) | Input 3
|_______________________________________________________________|
.
.
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| | | | | | | | | | | | | | | | |
| Last Trigger Angle (16-Bit Binary Angle) |
|_______________________________________________________________|
6.16 Set/Clear User LED (SLED)
This command simply turns the red user LED on and off under program control. The LED is on
during the initial running of internal diagnostics, and then remains off unless changed by this
command. Note that the red LED can be configured to serve as an internal activity indicator
(see TTY setups), in which case this command has no effect.
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| | | | | | | | | | | | | | | | |
| |LED| | 1 0 0 1 0 | Command
|___________________________|___|___________|___________________|
6.17 TTY Operation (TTYOP)
This command controls the TTY “chat mode” interface to the host computer. The command can
simulate the typing of characters on the RVP8’s setup TTY. Characters entered in this manner
are indistinguishable from those typed on the actual TTY; hence, whatever one can do via the